All these baby-boomer musicians are out there, and no one's leaving the stage. we're able to stick around because there's this big bulge of 52-year-olds in the population. people are still sort Terested in joni mitchell and bob dylan and me. but it's only because there's so many of us. until we start to die off, there's going to be this giant cloud hanging over the rest of the populati Ewsweek will start running articles like, "is s** necessary?" and "d**h, the next step." i don't know whether artists are going to have 40-year careers in this field habitua Attention spans are much shorter now.